CentOS Kernel Upgrades

This script updates kernel packages on a list of CentOS machines and gives them a reboot after a successful upgrade.

This script was written to help automate the updating of CentOS kernels on many machines at a time to mitigate against Meltdown and Spectre.

The script assumes a naming convention of a machine ending in [01]x*.[cd]om where x is a number which is controlled by supplying an ODD or EVEN argument. If this isn't appropriate you may change the regex at the bottom of the while loop to suit your naming convention.

Usage

./updateKernels.bash ci ODD Where:

• ci is the suffix of a file (machines-ci in this case) with a list of machine names adhering to the naming conventions listed above.
• ODD is one of either ODD or EVEN which will update either odd or even numbered machines